Saw-setting device.



S. A. MISCHANSKY.

SAW SETTING DEVlCE.

APPLICATION FILED NOV-6.1914.

1,159,407, Patented Nov. 9, 1915.

35 for all teeth of the same saw.

STEPHEN A. lVIISCHANSKY, 0F SYRACUSE, NEW YORK.

SAW- SET'IING DEVICE.

Specification of Letters Patent.

Patented Nov. e, 1915.

Application filed November 6, 1914. Serial No. 870,581.

. To all whom it may concern:

Be it known that I, STEPHEN A. MIscHAn- SKY, a subject of the Emperor ofAustria- Hungary, and resident of Syracuse, in the:

county of Onondaga, inrthe State of New which the following, taken inconnection with the accompanying drawings, is a full,

clear, and eXact description.

This invention relates to certain improvements' in saw-setting devicesinvolving the use of a guide for the saw and opposed sets of saw-settingjaws with suitable operating means therefor for setting a series of sawteeth in a single operation.

The main object is to provide a simple and comparatively inexpensive sawsetting device whereby the teeth of a saw may be set more uniformly andexpeditiously than has i heretofore been practised.

Anotherobject is to enable the'samedevice to be used for setting theteethof different saws in which such teeth are differently spaced. Afurther object is to provide simple means whereby the saw may beadjusted longitudinally a distance corresponding to the number of teethpreviously set without special painstaking care or watchfulness on f thepart of the operator.

A further object is to provide an adjustable stop cooperating with thejaw operating means for gaging the amount of set of the saw teeth sothat such set will be uniform Other objects and uses relating tospecific parts of the device will be brought out in" the followingdescription.

1n the drawings Figure 1 1s a per device showing a saw in operativerelation thereto. Fig. 2 1s a transverse vertical omitted. Fig. 3 is alongitudinal vertical sectional view taken on the plane of hue 3-3, Fig.2. Fig. 4 is a horizontal sectional view of it through the caseor frameof the same device, showing the opposed sets- 1 of jaws in top plan,togetherwith the operating means therefor. Fig. Sis a perspective viewof the detached sets of aws and their-supporting spindle together withthe vertically movable bar for closing the jaws upon the teeth ofasawand a portionvof the screw and lazy-tongs actuated thereby for adjustinggitudinal sectional viewof the gage bar and clamps by which it issecured to a saw, the central portion of the bar being broken away.

This devicecomprises a hollow frame or casing 1 having a base sectionsecured to a flanged bracket 3- in which is adjustable a screw clamp lcooperating with the under side of the base section -2 to clamp thedevice to a suitable support as a table or bench A.

The end walls as 5- and -5 of the case and also the front side as 2 arepreferably formed integral with the base as 7 are preferably made inseparate pieces and afterward secured together by,

bolts or screws -8- to allow the interior mechanism to be easilyinstalled or removed when desired.

The top section 7 is divided through its longitudinal centerto form aslot 9 for receiving and guiding a sawas -B, the slotted portion of thetop being flanged upwardly a sufhcient distance toform a convenientsupport for said saw. of the top at one side of the slot is provided thejaws axially. Fig. 6 is a lon- The portion:

.85 with a guideway 0r groove 10 for re ceiving a longitudinallyadjustable bar 11 which is provided at its ends with suitable clamps 12and -l3 for engaging the corresponding ends of'the saw, the clamp 13being adjustable lengthwise of the bar 1l to conform to saws ofdifferent lengths and being held in its ad-' I justed position by aset-screw -13. The lower edge of this bar is provided with a series ofnotches 1i spaced equi-distanceapart andcorresponding to the combinedlengths of a predetermined number of sawteeth which are to be set in asingle opera tion, said notches being engaged by a de tent 15- on theframe 'l-to prevent backward movement of same time to allow such saw tobe advanced step by step one notch space at a time as the predeterminednumber of its'te eth are set.

The central portion of the front side of the guide flange for the saw iscut away at 16 to render the pawl and tooth portion of the saw and barvisible therethrough so. that the operator may more conveniently de--termine the position of the notches and teeth" of the saw relatively tothe jaws, said'pawi" the saw, and at the about a common axis somedistance below the gripping edges of the jaws, the latter being providedwith pendent arms 23- below the spindle 22- and having downwardlydiverging cam faces -2t for engagement bya wedge shape bar -25 common toall the jaws so that when the bar is forced downwardly it will spreadthe lower ends of the jaws apart and force the upper edges of the jawsinto engagement with the teeth for setting the same.

The means for operating the jaws to set the teeth consist of a U-shapelever 26 extending around the front and sides of the case 1 and havingthe rear ends of its arms pivoted at 27- to the adjacent ends of thecase some distance to the rear of the jaws, while the front end of thelever is provided with a handle 28 by which it may be rocked verticallyto impart corresponding movement to the jaw operating bar -25-.

The jaw-operating bar 25 lies wholly within the case 1- and its ends areconnected to the opposite arms of the lever -26 by means of pivotalbolts or screws --Q9 passing through vertically elongated openings orslots 30 in the corresponding ends of the case 1 so as to permitvertical movement of said bar.

The aws of each set are arranged in spaced relation corresponding to thedistance between alternate teeth of the saw and register with the spacesbetween the jaws of the opposite set so that the opposed sets of jawsengage alternate teeth, one set serving to set its corresponding teethin one direction, while the other set serve to set its correspondingteeth in the opposite direction.

The front edges of the front set of jaws -21' and rear edges of the rearset of jaws 2l are preferably disposed in vertical planes parallel witheach other for receiving suitable means, as opposite lazytongs -32-, bywhich the jaws of both sets may be adjusted axially to vary the distancebetween them from center to center to correspond to the spacings of theteeth of different saws, thereby permitting the same device to be usedfor setting the teeth of different saws in which the spacings of theteeth vary.

Each lazy-tong extends lengthwise of the casing across and in closeproximity to the corresponding edges of the particular set of jaws whichit is to adjust and their cross connections corresponding in number tothe number of jaws of that particular set, the pivotal pins, as 33-,constituting such cross connections being attached to their corresponding jaws, while the ends of the tongs are connected respectively toa stationary cross bar 34 and an adjustable cross bar 35-, as shown moreclearly in Figs. 4 and 5. r

The hub of the stationary bar 34: is secured by a set-screw -36 to oneend of the shaft or spindle -22- close to the inner face of the adjacentend 'of-the case 1, the outer end of said spindle being provided with ahead -37- engaging the outer end of the adjacent end of the case tocooperate with the hub of the stationary arm 34: to hold the shaft orspindle '22 against end-' wise movement. r

The opposite end of the spindle -'22 extends through the hubs of thejaws-21- and 21' and into a threaded sleeve 38 which screws into thecorresponding end of the casing -1 and is provided with a hand-piece Z39by which it may be rotated.

The inner end of the threaded sleeve 38 is provided with an annulargroove t0 and is surrounded by the hub of the adjustable cross bar 35having a screw or pin -t1 entering the annular groove t0 to lock the arm35 and sleeve 38 against relative endwise movement, and at the sametime, permitting the said sleeve to be rotated independently of thecross bar for adjusting said cross bar axially, and therebyopening andclosing both of the lazy-tongs to effect a corresponding axialadjustment of both sets of jaws '21- and 21-.

The pivotal pin or shaft '27- to which the arms of the lever 26 aresecured extends lengthwise of and is journaled in the ends of the case 1and is surrounded by a coil spring -27 having one endiattached to saidshaft and its other end attached to the case for retracting the leverand allowing the jaws to open by their own weight aided by the weight ofthecentral portions of the lazy-tongs tending to sagi In order that allof the teeth of a saw may be uniformly set and the degree of set changedat will, I have provided an" adjustable stop-screw -42- on the frontofthe case cooperating with the lever -26 to limit the downward movementof said lever as may be desired. r

In operation, the saw is placed by hand within the slot 9- and securedto the bar 11- by the clamps 12 and -13- with its toothed edge betweenand parallel lot with the gripping edges of the jaws 21 and 2l'- afterwhich the bar with the saw thereon and also the jaws are adjusted untilthe first series of teeth to be set and jaws are properly registered.The pawl -15 is then set to register with the nearest tooth of the bar-11 whereupon the hand-lever -26- may be depressed to close the jawsupon and set that series of teeth. The bar -11 with the saw thereon isthen advanced one notch space of the bar -11 to register the nextadjacent series of teeth with the jaws which are again operated to setthe second series, these operations being repeated until all of theteeth of the saw are set, after which the saw may be removed from thebar 11 and replaced by another one if necessary.

What I claim is: V

1. In a saw-setting device, the combination of a spindle, opposite setsof aws turn able and movable axially on the spindle, screw operatedmeans for adjusting the jaws axially to register with the saw teeth, andlever operated means for rocking the jaws to set the teeth.

2. In a saw-setting device, the combination of a jaw-supporting spindle,opposed sets of jaws journaled on the spindle and adjustable lengthwisethereon, means for rocking the jaws to set the teeth of a saw, and meansfor adjusting the jaws of both sets axially to vary the space betweenthem to correspond to the spacings of the teeth of different saws.

3. In a saw-setting device, the combination of an inclosing case havingmeans on its lower side for clamping it to a bench or other support andits top provided with a central lengthwise slot forming a saw guide,means for supporting a saw in said guide with its teeth projecting intothe interior of the case, cooperative jaws wholly within said case forsetting the teeth, and means including a lever on the exterior of thecase for forcing the jaws into engagement with the protruding teeth ofthe saw.

4;. In a saw-setting device, the combination with an inclosing casehaving a guide slot for receiving a saw, of a saw clamping and holdingdevice movable lengthwise of and upon the case along said guide slot,sawsetting aws mounted wholly within the case, and means on the case foroperating the jaws to set the teeth of the saw.

5. In a saw-setting device, the combination of an inclosing case havinga lengthwise guide slot in the upper side thereof, means movablelengthwise of and upon the case for supporting a saw in said guide slot,a spindle extending lengthwise of and within the case, opposite sets ofjaws mounted on the spindle to rock thereon and wholly within the case,said jaws being provided with cam faces in spaced relation, a barmovable within the case against said cam faces with a wedging action toclose the jaws upon the teeth of a saw, and means including a lever onthe exterior of the case for operating said bar.

6; In a saw-setting device, the combination of a frame having alengthwise slot to receive and guide a saw, opposed sets of jaws movableacross the slot, those of each set being arranged in spaced relation andregistered with the spaces of the other set, means for operating thejaws to close them upon the teeth of a saw, a guide bar slidable on theframe lengthwise of the slot and provided with meansfor clamping it to asaw, and cooperative devices on the bar and frame, respectively, forgaging the lengthwise movement of the bar and saw to which it is clampeda distance corresponding to the number of teeth operated upon by thejaws, whereby a number of teeth on the saw corresponding to the numberof jaws may be operated on successively.

7. In a saw-setting device, the combination of an inclosing case havingmeans on the lower side thereof for clamping it to a bench or othersupport, said case having its top provided with an upstanding lengthwiseflange provided with a lengthwise guide slot for receiving a saw, saidflange being provided with a lengthwise way, a bar slidable in said wayand provided with means for clamping a saw thereto, means for clampingthe bar to said flange, opposed sets of jaws mounted wholly within thecase and movable about one and the same axis, and means for operatingsaid jaws to set the teeth of the saw.

8. In a saw-setting device, the combination of a plurality of sawsetting jaws hinged to swing about a common axis, lazytongs connectionsbetween said jaws, means for operating the jaws to set the teeth of asaw and separate means for operating the lazy-tongs to vary the spacebetween them to correspond to the spacings of the teeth of differentsaws.

9. In a saw-setting device, opposed sets of saw-setting jaws, lazy-tongsconnections be tween the jaws of both sets, means for operating the jawsto set the teeth of a saw, and separate means for operating bothlazytongs simultaneously to vary the space between the jaws tocorrespond to the spacings of the teeth of diiferent saws.

In witness whereof I have hereunto set my hand this 21st day of October,191%.

STEPHEN A. MISCHANSKY. Witnesses:

H. E. CHAsE, Anion M. CANNON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

